Fix tests affected by Jackson stubs changes

Author: atorralba

java/ql/test/query-tests/security/CWE-502/options

@@ -1 +1 @@
-//semmle-extractor-options: --javac-args -cp ${testdir}/../../../stubs/snakeyaml-1.21:${testdir}/../../../stubs/xstream-1.4.10:${testdir}/../../../stubs/kryo-4.0.2:${testdir}/../../../stubs/jsr311-api-1.1.1:${testdir}/../../../stubs/fastjson-1.2.74:${testdir}/../../../stubs/springframework-5.3.8:${testdir}/../../../stubs/servlet-api-2.4:${testdir}/../../../stubs/jyaml-1.3:${testdir}/../../../stubs/json-io-4.10.0:${testdir}/../../../stubs/yamlbeans-1.09:${testdir}/../../../stubs/hessian-4.0.38:${testdir}/../../../stubs/castor-1.4.1:${testdir}/../../../stubs/jackson-databind-2.12
+//semmle-extractor-options: --javac-args -cp ${testdir}/../../../stubs/snakeyaml-1.21:${testdir}/../../../stubs/xstream-1.4.10:${testdir}/../../../stubs/kryo-4.0.2:${testdir}/../../../stubs/jsr311-api-1.1.1:${testdir}/../../../stubs/fastjson-1.2.74:${testdir}/../../../stubs/springframework-5.3.8:${testdir}/../../../stubs/servlet-api-2.4:${testdir}/../../../stubs/jyaml-1.3:${testdir}/../../../stubs/json-io-4.10.0:${testdir}/../../../stubs/yamlbeans-1.09:${testdir}/../../../stubs/hessian-4.0.38:${testdir}/../../../stubs/castor-1.4.1:${testdir}/../../../stubs/jackson-databind-2.12:${testdir}/../../../stubs/jackson-core-2.12

java/ql/test/stubs/jackson-databind-2.12/com/fasterxml/jackson/databind/ObjectMapper.java

@@ -9,6 +9,7 @@
 import com.fasterxml.jackson.core.*;
 import com.fasterxml.jackson.core.type.ResolvedType;
 import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.jsontype.PolymorphicTypeValidator;
 
 public class ObjectMapper implements java.io.Serializable // as of 2.1
 {
@@ -587,4 +588,6 @@ public <T> T updateValue(T valueToUpdate, Object overrides) throws JsonMappingEx
     return null;
   }
 
+  public void setPolymorphicTypeValidator(PolymorphicTypeValidator ptv) {}
+
 }